Lock-barrel-locking means



March 10, 1925- 1,529,071

A. E. LEACH LOCK BARREL LOCK ING MEANS Filed June 22, 1923 ATTORNEY Patented Mar. 10, 1925.

. UNITED STATES PATENT OFFICE.

ALBERT E. LEACH, OF DETROIT, llIICI-IIGAN, ASSIGNOR TO THE STUDEBAKER CORPORA- .TION, OF SOUTH BEND, INDIANA, AND DETROIT, MICHIGAN, A CORPORATION OF NEW JERSEY.

LOCK-BARREL-LOCKING MEANS Application filed June 22, 1923. Serial No. 647,170.

To all whom it may concern:

Be it known that I, ALBERT E. LEAOH, a citizen of the United States of America, and resident of Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Lock-Bar'i'el-Locking Means, of which the following is a specification.

This invention relates to means for looking lock barrels in position and has for its object the providing of such a means wheref by the lock barrel may be inserted into its support at any convenient time, and which after being inserted cannot be removed without the expenditure of considerable time, and material damage to the'parts involved.

Usually lock barrels are held in place by screws which necessarily must be exposed in some particular position and which are therefore readily removable from that position. This is a particular disadvantage in the case of automobile locks'where the time element needed to force a lock has an important bearing on theft insurance rates.

I provide a means for locking the lock barrel in position whereby there is no way to remove the barrel after it is locked in place except by materially damaging the barrel or support, and such removal must necessarily take a relatively long perlod of time. I

Another advantage of this locking means is that the lock barrel may be easlly and quickly inserted in its support at any time, the state of assembly of the support making no difference whatever to the time for in serting the lock barrel therein. This is again particularly advantageous in the building of automobiles where it is clearable to insert the lock barrel as the last operation of assembly so as not to interfere in the assembly of the rest of the parts.

The method I use is to provide a spring pressed plunger in the lock barrel which may be depressed flush with or below the surface of the lock barrel. I also providethe support with an opening of substantially the same size as the plunger and which may be matched with the plunger opening in the lock barrel. In assembling the lock barrel to its support the plunger is depressed below the surface of the lock barrel and the latter is inserted in its support and moved around until the plunger opening matches with the opening in the support which. al-. lows the plunger to move into the support.

The opening in the supportis blind and of less depth than the length of the-plunger so that the plunger remains partly in both'the lock barrel and the support, locking the same securely together.

In order to more fully explain my in-ven-' tion will refer to the accompanying draw} 'IIIgS 111 which a suitable embodiment of my invention is shown.

Flg. 1 1s a partially broken perspective view showing the lock barrel mounted in its support and showing the manner in which at is secured therein.

Fig. 2 is a view 'of the spring that tends to force the locking cup or plunger outwardly from the lock barrel. I

Fig. 3 is a sectional side view of the looking cup or plunger used to lock the lock barrel in its support.

1 is a support for a lock support lin this particular case is the transmission cover of an automobile. port 1 is drilled out to form an opening of slightly larger diameter than the lock barrel 2 and of sucha depth that when the lock barrel 2 is seated on the bottom of the opening its upper face is flush with the adjacent face of the support 1. The lock barrel 2 has a rod 3 terminating in a flattened portion 4: fastened to its revolvable part. When The supbarrel 2. The

the key is inserted in the lock and turned,

the flattened portion 4 turns and spreads balls or pins, as the case may be, into notches into the other side where it forms a blind hole 8 'of less depth than the length of the cup 6, preferable about half, and in such a position that when the lock barrel 2 is properly inserted in its support 1 the opening .5 and blind hole 8 are axially aligned. In

the operation of inserting the lock barrel 2 i in the support. 1, the spring 9 is inserted in the cup 6 and the cup 6 is then inserted in the opening 5 open end first. The cup 5is then depressed against the pressure of the spring 9 below thesurface of the lock-bart I the cup 6; ispositioried.

rel 2 and the latter is inserted into its 0 ening in support 21. -Whenithe%lock ar- -i barrel 2, and therefore locks the latter se' ,seurely in lthewsupport l.- Ittis preferable F that, the blind hole 8Ibe in such-a position that his impossibleto drill intoaitffrorn. that la -support 1.

v side, -!altho iftheiihole J7dgsplugged so-as to be vconcealed it sis impossibleto .tell where It is evident that either, the lockibarrel or thersupport must now. be darnagedin orderto force-the cup-6 baek intohthe lock'barrel :2 in girder :to *remove i the. same .frorn1the Formal changes naay *be made. thee speci-fic embodimenv ofthe i invention-described without departing from the): spirit OI--2Slilbstance of the broad iIIVGIIiElOIJJ'tl'IGQSCQPG tot which" is commensurate i with the appended claims.

What I claim is-:

1.:Ina-a hocking dev'iee -a ey1indriea1 leek barrel and a supportprovidedwwithianropento receive said lock barrelg-rasbliniiihole in ztthe side .of 'esaid. lock barrel; ea 1 plunger of less length .1 than athe :depthaof lithe blind hole slidable in said blind hole and tending to zbetforcedi outwardly therefrom by resilient means; and a blindhole'within the opening of said support of less depththan the length of said plunge1--.zan4d ,ofsi sub'stan: tially the sanre diameter-Has Ithe blind hole in said lock barrel; said bl'ind holesbeing "'a'ligne d when said lock barrel is properly .inserted in saidsupport, allowing said plunger to enter the said'blind hole in the said support. a

2.-,In a locking device, cylindrical lock barrel; support-l having an opening therein do receive ,said loc'k barr el, an opening in the 'isidezofsai-d lockbarrel a cuprshape'd plungercofllesslen-gththan'the depth of said ,openingfin =said lock barrel, a. spring inter} posedbetweentthe closed end ofsaid plunger uandtthe inner'face of said openingto force -1Sfild plunger outwardly, and an opening textendingintorsaid support and oflessfdepth than'thedeng'th of said plunger-to "receive the outer end ofsaid plunger when the pen- M ings iin=-said locklbarrel and support. are E in tialignment, and thereby prevent "removal "of saidfllock barrel from said support.

vSigned by me at .'-'Detroit, fMichi'ganf l UJS; 7A.; this 115th 'day'of 'June,1923.

QWitnesses HonesoN S. :P nnon, \Anrnonsns F. Sums. 

